This is the Ağca Masjid, the oldest religious building in Adana, built under Ağca Bey in 1489. In 1770 it was restored thoroughly under Hacı Hasan Ağa. It resembles a türbe from the outside. It was damaged in an 27 June 1998 earthquake, and was back at work in 2004. The building is quite close to the Ulu Camii.